.left-btn{
    position: fixed;
    width: 100px;
    left: 150px;
    top: 200px;
    z-index: 999;
    box-sizing: border-box;
    text-align: center;
    .floorbtn{
        display: flex;
        flex-direction: column;
        li{
            width: 100%;
            height: 40px;
            line-height: 40px;
            margin: 2px 0;
            border: 2px solid #ddd;
            color: #1e74e4;
            >span{
                pointer-events: none;
            }
        }
        li:hover,li.active{
            color:#f1f1f1;
            border: 2px solid #f32;
            background-color: #f23;
        }
        
    }
    .totop{
        width: 100%;
        border: 2px solid #ddd;
        background: #fff;
        opacity: 0.8;
        margin: 20px 0;
        font-size: 18px;
        text-align: center;
        padding: 12px 0;
        color: #999;
        
    }
}   